Please do not confuse updating to a new release (example: from QuickBooks 2016 R3P to R5P) with upgrading to a new version (example: from QuickBooks Desktop 2015 to QuickBooks Desktop 2016).
You can use either:
You can choose to manually or automatically download and install updates to your QuickBooks Desktop. The following are the options available for both.
Note: Updating to a new release (example: R3P to R5P) sometimes needs to make minor changes in the database. These changes will not make the data file incompatible with earlier releases.